#require git

  $ echo "[core]" >> $HOME/.gitconfig

  $ echo "autocrlf = false" >> $HOME/.gitconfig

  $ echo "[core]" >> $HOME/.gitconfig

  $ echo "autocrlf = false" >> $HOME/.gitconfig

  $ echo "[extensions]" >> $HGRCPATH

  $ echo "convert=" >> $HGRCPATH

  $ echo '[convert]' >> $HGRCPATH

  $ echo 'hg.usebranchnames = True' >> $HGRCPATH

  $ echo 'hg.tagsbranch = tags-update' >> $HGRCPATH

  $ GIT_AUTHOR_NAME='test'; export GIT_AUTHOR_NAME

  $ GIT_AUTHOR_EMAIL='test@example.org'; export GIT_AUTHOR_EMAIL

  $ GIT_AUTHOR_DATE="2007-01-01 00:00:00 +0000"; export GIT_AUTHOR_DATE

  $ GIT_COMMITTER_NAME="$GIT_AUTHOR_NAME"; export GIT_COMMITTER_NAME

  $ GIT_COMMITTER_EMAIL="$GIT_AUTHOR_EMAIL"; export GIT_COMMITTER_EMAIL

  $ GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"; export GIT_COMMITTER_DATE

  $ count=10

  $ action()

  > {

  >     GIT_AUTHOR_DATE="2007-01-01 00:00:$count +0000"

  >     GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"

  >     git "$@" >/dev/null 2>/dev/null || echo "git command error"

  >     count=`expr $count + 1`

  > }

  $ glog()

  > {

  >     hg log -G --template '{rev} "{desc|firstline}" files: {files}\n' "$@"

  > }

  $ convertrepo()

  > {

  >     hg convert --datesort git-repo hg-repo

  > }

Build a GIT repo with at least 1 tag

  $ mkdir git-repo

  $ cd git-repo

  $ git init >/dev/null 2>&1

  $ echo a > a

  $ git add a

  $ action commit -m "rev1"

  $ action tag -m "tag1" tag1

  $ cd ..

Do a first conversion

  $ convertrepo

  initializing destination hg-repo repository

  scanning source...

  sorting...

  converting...

  0 rev1

  updating tags

  updating bookmarks

Simulate upstream  updates after first conversion

  $ cd git-repo

  $ echo b > a

  $ git add a

  $ action commit -m "rev2"

  $ action tag -m "tag2" tag2

  $ cd ..

Perform an incremental conversion

  $ convertrepo

  scanning source...

  sorting...

  converting...

  0 rev2

  updating tags

  updating bookmarks

Print the log

  $ cd hg-repo

  $ glog

  o  3 "update tags" files: .hgtags

  |

  | o  2 "rev2" files: a

  | |

  o |  1 "update tags" files: .hgtags

   /

  o  0 "rev1" files: a

  $ cd ..